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Precipitation patterns have also fluctuated, with Sept. 21, 2019 recording the highest precipitation in the past 15 years at 15.5 mm, all of which came from rainfall. Interestingly, 10 years out of the last 15 years had no measurable precipitation on this date.
Wind speeds have varied as well, with the strongest gust on Sept. 21 reaching 41 mph (2018) and the highest sustained wind speed recorded at 19 mph (2014).
These historical trends suggest that the weather on Sept. 21 in Coal City has been quite unpredictable over the years.
Historical Sept. 21 Weather in Coal City (Last 15 Years)
| Year | High Temp (°F) | Low Temp (°F) | Precipitation (mm) | Rain (mm) | Snowfall (mm) | Strongest Wind Gust (mph) | Max Wind Speed (mph) |
|---|---|---|---|---|---|---|---|
| 2010 | 88.3°F | 69.7°F | 9.5 mm | 9.5 mm | 0 mm | 29 mph | 14 mph |
| 2011 | 71.2°F | 58.4°F | 0 mm | 0 mm | 0 mm | 28 mph | 14 mph |
| 2012 | 71.6°F | 50.5°F | 1.1 mm | 1.1 mm | 0 mm | 24 mph | 12 mph |
| 2013 | 67.5°F | 55.3°F | 0 mm | 0 mm | 0 mm | 22 mph | 10 mph |
| 2014 | 68.0°F | 53.8°F | 0 mm | 0 mm | 0 mm | 36 mph | 19 mph |
| 2015 | 73.0°F | 50.5°F | 0 mm | 0 mm | 0 mm | 12 mph | 6 mph |
| 2016 | 83.0°F | 68.8°F | 0 mm | 0 mm | 0 mm | 25 mph | 8 mph |
| 2017 | 91.9°F | 72.3°F | 0 mm | 0 mm | 0 mm | 22 mph | 9 mph |
| 2018 | 82.2°F | 59.1°F | 0 mm | 0 mm | 0 mm | 41 mph | 18 mph |
| 2019 | 83.0°F | 70.0°F | 15.5 mm | 15.5 mm | 0 mm | 41 mph | 18 mph |
| 2020 | 74.5°F | 51.7°F | 0 mm | 0 mm | 0 mm | 17 mph | 8 mph |
| 2021 | 73.6°F | 62.1°F | 13.2 mm | 13.2 mm | 0 mm | 32 mph | 15 mph |
| 2022 | 85.5°F | 63.7°F | 0 mm | 0 mm | 0 mm | 27 mph | 14 mph |
| 2023 | 74.8°F | 63.8°F | 13.2 mm | 13.2 mm | 0 mm | 22 mph | 12 mph |
| 2024 | 92.0°F | 63.6°F | 0 mm | 0 mm | 0 mm | 18 mph | 9 mph |
